One sea lion was reported along the side of Westshore and Whaleship roads just after 1:30 p.m., California Highway Patrol spokeswoman Barbara Upham said.
CHP officers responded to the incident to provide traffic control. Although no lanes were blocked, drivers were reportedly slowing down to look at the sea lion, causing a slight backup.
Another sea lion that became stranded was then picked up from Doran Beach a little ways down the coast, according to Marine Mammal Center spokesman Jim Oswald.
Both sea lions will be brought to the Marine Mammal Center's headquarters in Sausalito for evaluation and any necessary treatment, Oswald said.
The center rescues marine mammals in need along a 600-mile span of the California coast, from Mendocino County to San Luis Obispo County, according to Oswald.
Anyone who sees a marine mammal in distress may call the center's 24-hour hot line at (415) 289-SEAL.